A high-precision SCARA robot arm assembly and a high-precision SCARA robot

Abstract

The utility model discloses a high accuracy SCARA robot small arm subassembly and high accuracy SCARA robot, including small arm, screw rod, guide rod, J3 axle motor and J4 axle motor, the screw rod sets up on small arm, the guide rod sets up on small arm with screw rod parallel, the upper end and the lower end of guide rod are fixed with upper connecting piece and lower connecting piece respectively, and upper connecting piece and lower connecting piece are rotatoryly connected with the upper end and the lower end of screw rod respectively, and guide rod adopts the sliding installation of upper linear bearing and lower linear bearing and is installed on small arm, wherein upper linear bearing and small arm gap fit, and lower linear bearing and small arm transition fit. The upper linear bearing of utility model in the paper and small arm are gap fit, and it has certain activity space in horizontal direction to small arm, to eliminate the processing error when the hole of installing upper linear bearing and lower linear bearing on small arm is opened, improve the parallelism of guide rod and screw rod, reduce the wear and tear in the rotation of screw rod and the vertical movement of screw rod and guide rod, thereby improve the service life and precision of robot.

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